Feel I have to post this here.
We are getting alot of support tickets, regarding ACA500 cards not working.
1) Please make sure you only connect the ACA500 (nothing else).
2) Make sure your edge connector is clean and cleaned properly.
In Beta testing, I must have tested 20+ boards. Around 12 of these gave random colour screens. I would clean the edge connector very well and every single one was find after that.
Also take care when inserting the ACA500. Same goes for the CF cards, already had a report of someone bending the pins.